Tool-holder for cutter-chains of coal-cutting machines.



PATENTED AUG. 22, 1905.

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TOOL HOLDER FOR GUTTER CHAINS 0F COAL CUTTING MACHINE-S. Arrmourox FILED un. 7. 1905.

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UNITED sTATEs PATENT oEEIoE.

EDWARD HOPKINSON AND ALFRED AUSTIN HOPKIN SON, OF SALFORD, ENGLAND.

TOOL-HOLDER FOR CUTTER-CHAINS 0F COAL-CUTTING MACHINS.

Specification of Letters Patent.

Patented Aug. 22, 1905.

Appucaamtied Apru 7. 1905. serial No. 254,404.

To a/ZZ whom t may concern:

Be it known that we, EDWARD HOPKINsoN and ALFRED AUSTIN HorKINsoN, subjects of His Majesty the King of Great Britain,` and residents of Salford, in the county of Lancaster, England, have invented a certain new and useful Improvement in Tool-Holders for Cutter-Chains ofA Coal-Cutting Machines, of which the following is a speciiication.

The present invention relates to the toolholders for cutter-chains of coal-cutting machines, the object being to provide means whereby the cutting-tools may be removed from the chain more easily and also for securely holding the cutters in said chains.

Referring tothe drawings, which illustrate this invention, Figure l is a plan of the complete holder for a single cutter in its closed position. Fig. 2 is a plan, partly in section, of the hold er, showing the carrier portion opened with the tool inserted. Fig. 3 is an end view of a holder for use with two cutters. Fig. 4 is a perspective view of the cutter.

The holder shown in Figs. l and 2 consists of two parts, the link portion A, which lies on the insideV when the chain is in its working position and constitutes one of the links of the said chain, being attached in the ordinary manner to the plain links by pins passing through lugs. A cover or carrier B is hinged to the portion A by any suitable means, such as by a permanent hinge pin C, passing through lugs formed on the parts A and B. A hole D is provided in the carrier B, such hole being formed on a line passing directly through a saddle -piece H, hereinafter described, which hole is adapted to receive the cutting-tool E, the inner part thereof being provided with a recess cl, adapted to receive a lug or projection e, formed on the tool, so that when the carrier is closed down the tool cannot slipthrough.

When the tool is in position and the holder closed, the butt-end G of the tool bears against the top of a saddle-shaped piece H on the link portion A, by means of which the tool is held firmly in cutting position. The parts A and B are held in closed position by means of a removable loose locking pin J passing through holes in lugs on the link portion and carrier, respectively, which pin may be simply dropped into position from the upper side of the chain without any riveting or otherwise, or any other easily-opened form of means for holding the parts closed may be used.

Fig. 3 shows a modified form of tool-holder, the partB being constructed to hold two tools, being provided with two holes D', which are set on lines passing through the saddle H, as in the previous case. The butt-ends of the tools thus bear against the sides of the saddleshaped piece H. In practice it is found preferable to alternately place single and double tool-holders on the chain, or they may be placed in any convenient order, as the saddleshaped piece H is suitable either for use with one or more tools.

What we claim isl. In a tool-holder of the character described the combination with a link portion forming one of the links of a chain, of a tool-carrier permanently hinged thereto, and means for securing a tool in said carrier and holding the parts closed.

2. In atool-holder of the character described the combination with a link portion forming one of the links of a chain, of a saddle-piece formed thereon, a tool-carrier permanently hinged to said link part and means for holding the carrier closed on said link portion.

3. In a tool-holder of the character described the combination with a link portion forming one of the links of a chain, of a saddle-piece formed thereon, a tool-carrier permanently hinged to said link part, adapted to partly embrace said saddle and having a hole for a tool the line of which opening passes directly through the saddle and means for holding the carrier closed on said link portion.

4. In a tool-holder of the character described the combination with a link portion forming one of the links of a chain, of a carrier permanently hinged thereto, a tool carried thereby, a projection on said tool adapted to seat in a recess formed in the carrier, a saddleshaped part on the link portion adapted to abutagainst the' tool when in closed position, and means for holding the carrier closed on said link portion.

5. In atool-holder of the character described the Combination with a link portion forming one of the links of a chain, of a carrier permanently hinged thereto, a tool Carried by said hinged carrier, means for holding kthe tool in place on the closing of the carrier, lugs formed on said link part and carrier, and a loose pin adapted to drop through holes formed in said lugs whereby the parts are held closed.

In testimony whereof we have hereunto set our hands in the presence of two subscribing wltnesses.

EDWARD HOPKINSON. ALFRED AUSTIN HoriuNsoN.

Hopkinsonz GERALD B. HERTZ, ALFRED HOPKINSON. 

